An umbrella quick-drying supporting cylinder comprises a cylinder body, a top cover and a bottom cover. A stainless steel lining and a water-absorbing cloth inner core are arranged in the cylinder body. A layer of water-absorbing sponge is clamped between the stainless steel lining and the water-absorbing cloth inner core. The top cover is connected with a top cover scratching piece. A bottom support is arranged in the bottom cover and upwards extends into the water-absorbing sponge. Through the ultrahigh water-absorbing capacity of polyvinyl alcohol, through the combination of a pen cap structure, an umbrella is fixed, and a water control effect can be achieved; the top cover is ingenious in structure, due to multiple-layer embedment, the umbrella can be conveniently fixed only by rotating the top cover, and operation is easy and convenient; the weight of the whole cylinder does not exceed 1 kilogram, the shape of the whole cylinder looks like a water bottle, and the cylinder is convenient to carry about.